| 压实非饱和土的模量与含水率关系分析(英文) |
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| 引用本文： | 章定文,刘松玉,张涛.压实非饱和土的模量与含水率关系分析(英文)[J].东南大学学报,2012(2):209-214. |
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| 作者姓名： | 章定文 刘松玉 张涛 |
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| 作者单位： | 东南大学交通学院 |
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| 基金项目： | The Natural Science Foundation of Jiangsu Province(No. BK2011618) |
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| 摘 要： | 为了客观可靠地评价实际工程中路基压实土的工程性能,在路基填筑设计时考虑了道路实际服务期内气候变化对路基压实土性能的影响. 鉴于含水率测试方法简单且应用广泛,直接采用含水率代替吸力寻求压实非饱和土模量和含水率之间的联系. 采用非饱和土三轴仪对不同初始压实含水率和经历干湿过程后不同含水率土样进行常含水率三轴试验,分析了含水率和围压等对土体模量的影响规律. 研究结果表明: 土体含水率的增加会引起非饱和压实土体模量的降低,且在试验含水率范围内非饱和压实土体模量随含水率呈指数规律变化; 土体模量随围压的增大而增加,但含水率对模量的影响较围压对模量的影响更为显著. 该研究可为服务期内非饱和压实路基土的性能变化评价提供参考.
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| 关 键 词： | 模量 含水率 非饱和压实土 |
Water content and modulus relationship of a compacted unsaturated soil |
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| Zhang Dingwen Liu Songyu Zhang Tao.Water content and modulus relationship of a compacted unsaturated soil[J].Journal of Southeast University(English Edition),2012(2):209-214. |
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| Authors: | Zhang Dingwen Liu Songyu Zhang Tao |
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| Institution: | Zhang Dingwen Liu Songyu Zhang Tao(School of Transportation,Southeast University,Nanjing 210096,China) |
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| Abstract: | In order to assess the performance of the embankment soil under various climate conditions during the period of service,the modulus behaviour of an unsaturated compacted soil is evaluated using the constant water content triaxial test.Since the water content measurement method is simple and economical and it is used widely in engineering,the soil suction is replaced by the water content and the relationship between the water content and the modulus is developed.The compacted samples are prepared with different compacted water contents,and samples with a similar water content subjected to drying or wetting procedures prior to the triaxial test are also investigated.The effect of the water content and the confining pressure on the modulus is analyzed.The results show that the modulus decreases with the increase in the water content and a power function can be proposed to quantitatively describe the relationship between the modulus and the water content in the range of the measured water content.The modulus increases with the increase in the confining pressure of the compacted soil.However,the effect of the water content on the modulus is more pronounced than that of the confining pressure.This research can be referenced for the compacted embankment soil assessment in-service period. |
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| Keywords: | modulus water content unsaturated compacted soil |
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